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yulyashka [42]
3 years ago
13

Which of the following statements about osmosis is correct?

Biology
1 answer:
Pavlova-9 [17]3 years ago
5 0

Answer:

D. The presence of aquaporins (proteins that form water channels in the membrane) should speed up the process of osmosis.

Explanation:

Water moves in the cells through osmosis which means water moves from its higher concentration to lower concentration. In many animals and plants, water channels are also present which is called aquaporins which allow the water to move through it in and out of cell more quickly.

The rate of diffusion by channel proteins is higher than simple diffusion therefore the aquaporins speed up the process of osmosis. No ATP is required to transport the water through aquaporin channel proteins.

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Protozoans are the only organisms that can convert nitrogen from the air into chemical compounds that plants can use.
tigry1 [53]

Answer: False

Explanation:

Protozoans are not the organism that fix nitrogen for the plants. The organism that fix nitrogen to convert it into a form which can be used by plants are known as diazotrophs.

These are bacteria and archae that fix nitrogen gas found in the atmosphere into more usable form such as ammonia.

These organism can grow without any external source of fixed nitrogen. Example: Rhizobia and azospirillium.

5 0
2 years ago
Explain how oxygen and carbon dioxide move with breathing.
zmey [24]

Answer:

Gas exchange takes place in the millions of alveoli in the lungs and the capillaries that envelop them. As shown below, inhaled oxygen moves from the alveoli to the blood in the capillaries, and carbon dioxide moves from the blood in the capillaries to the air in the alveoli.

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4 0
2 years ago
Where exactly on the map does the size and concentration of the boxes appear to be the highest?
pav-90 [236]

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Explanation:

The black boxes represent relative numbers of death due to cholera. Cholera is referred to as a disease of poverty because of the lack of social development in the areas in which it occurs. Crowded camps are fertile ground for a cholera outbreak. Other humanitarian crises including flooding and earthquakes, civil unrest or war that causes disruption of water and sanitation systems.

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2 years ago
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Answer:

Si existe variación en el acervo genético de la población, esto permite que la selección natural actúe sobre los rasgos de la población que permiten la adaptación al ambiente cambiante. Cuanta más diversidad hay en una población, mayor es la probabilidad de que la población pueda adaptarse a los nuevos cambios.

Explanation:

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